I am considering opening a 3rd and 4th currant account (I believe what you call a chequing account) because I can get 5% and 4% APR with only having to deposit £500 and £1500 a month respectively. If I just send my salary on a 4 account trip each month (sending it on as a transfer to each account consecutively) I could maximise my interest earnings.

Is this something to consider? Is it too complicated? Will it damage my credit score?

What do you do to maximise your financial situation?